Zobrazeno 1 - 10
of 421
pro vyhledávání: '"Nys J"'
Autor:
JPAC Collaboration, Ng, L., Bibrzycki, L., Nys, J., Fernandez-Ramirez, C., Pilloni, A., Mathieu, V., Rasmusson, A. J., Szczepaniak, A. P.
Publikováno v:
Physical Review D 105 (2022) L091501
We perform the first model independent analysis of experimental data using Deep Neural Networks to determine the nature of an exotic hadron. Specifically, we study the line shape of the $P_c(4312)$ signal reported by the LHCb collaboration and we fin
Externí odkaz:
http://arxiv.org/abs/2110.13742
Autor:
González-Jiménez, R., Jachowicz, N., Nikolakopoulos, A., Nys, J., Van Cuyck, T., Van Dessel, N., Niewczas, K., Pandey, V.
Publikováno v:
PoS(NuFact2017)072
We present the current status of the research activities of the Ghent group on neutrino-nucleus interactions. These consist in the modeling of some of the relevant neutrino-nucleus reaction channels at intermediate energies: low-energy nuclear excita
Externí odkaz:
http://arxiv.org/abs/2001.08958
Autor:
JPAC Collaboration, Rodas, A., Pilloni, A., Albaladejo, M., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Mikhasenko, M., Nys, J., Pauk, V., Ketzer, B., Szczepaniak, A.
Publikováno v:
Phys. Rev. Lett. 122, 042002 (2019)
Mapping states with explicit gluonic degrees of freedom in the light sector is a challenge, and has led to controversies in the past. In particular, the experiments have reported two different hybrid candidates with spin-exotic signature, pi1(1400) a
Externí odkaz:
http://arxiv.org/abs/1810.04171
Autor:
JPAC Collaboration, Mikhasenko, M., Pilloni, A., Albaladejo, M., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Nys, J., Rodas, A., Ketzer, B., Szczepaniak, A. P.
Publikováno v:
Phys. Rev. D 98, 096021 (2018)
We perform an analysis of the three-pion system with quantum numbers $J^{PC}=1^{++}$ produced in the weak decay of $\tau$ leptons. The interaction is known to be dominated by the axial meson $a_1(1260)$. We build a model based on approximate three-bo
Externí odkaz:
http://arxiv.org/abs/1810.00016
Autor:
JPAC Collaboration, Jackura, A., Fernández-Ramírez, C., Mathieu, V., Mikhasenko, M., Nys, J., Pilloni, A., Saldaña, K., Sherrill, N., Szczepaniak, A. P.
Further progress in hadron spectroscopy necessitates the phenomenological description of three particle reactions. We consider the isobar approximation, where the connected part of the $\mathbf{3}\to\mathbf{3}$ amplitude is first expressed as a sum o
Externí odkaz:
http://arxiv.org/abs/1809.10523
Autor:
JPAC collaboration, Silva-Castro, J. A., Fernandez-Ramirez, C., Albaladejo, M., Danilkin, I. V., Jackura, A., Mathieu, V., Nys, J., Pilloni, A., Szczepaniak, A. P., Fox, G.
Publikováno v:
Phys. Rev. D 99, 034003 (2019)
We use Regge phenomenology to study the structure of the poles of the $N^*$ and $\Delta^*$ spectrum. We employ the available pole extractions from partial wave analysis of meson scattering and photoproduction data. We assess the importance of the ima
Externí odkaz:
http://arxiv.org/abs/1809.01954
Publikováno v:
Phys. Rev. E 99, 023304 (2019)
Still under debate is the question of whether machine learning is capable of going beyond black-box modeling for complex physical systems. We investigate the generalizing and interpretability properties of learning algorithms. To this end, we use sup
Externí odkaz:
http://arxiv.org/abs/1807.02468
Autor:
Mathieu, V., Nys, J., Fernandez-Ramirez, C., Blin, A. N. Hiller, Jackura, A., Pilloni, A., Szczepaniak, A. P., Fox, G.
Publikováno v:
Phys. Rev. D 98, 014041 (2018)
We derive and apply the finite energy sum rules to pion photoproduction. We evaluate the low energy part of the sum rules using several state-of-the-art models. We show how the differences in the low energy side of the sum rules might originate from
Externí odkaz:
http://arxiv.org/abs/1806.08414
Autor:
JPAC Collaboration, Nys, J., Blin, A. N. Hiller, Mathieu, V., Fernández-Ramírez, C., Jackura, A., Pilloni, A., Ryckebusch, J., Szczepaniak, A. P., Fox, G.
Publikováno v:
Phys. Rev. D 98, 034020 (2018)
Many experiments that are conducted to study the hadron spectrum rely on peripheral resonance production. Hereby, the rapidity gap allows the process to be viewed as an independent fragmen- tation of the beam and the target, with the beam fragmentati
Externí odkaz:
http://arxiv.org/abs/1806.01891
Autor:
JPAC Collaboration, Pilloni, A., Nys, J., Mikhasenko, M., Albaladejo, M., Fernandez-Ramirez, C., Jackura, A., Mathieu, V., Sherrill, N., Skwarnicki, T., Szczepaniak, A. P.
We discuss the differences between several partial-wave analysis formalisms used in the construction of three-body decay amplitudes involving fermions. Specifically, we consider the decay Lambda_b -> psi p K- , where the hidden charm pentaquark signa
Externí odkaz:
http://arxiv.org/abs/1805.02113